Hello.
If I buy Metronic for $49, I will have the rights as you say in the License Terms?
If not, how do I get that license?

About All-in License
All-in license grants you the use of the Item in unlimited End Products.

You Can
Create unlimited End Products
Use in End Products with paying users(SaaS).
Modify or combine with other End Products.
Use graphics separately from the Item.
Buy a license and transfer the license ownership to your client.